class Calculator{
    private int num1;
    private int num2;

    public void setNum1(int num1){
        this.num1 = num1;
    }
    public int getNum1(){
        return this.num1;
    }

    public int getNum2() {
        return num2;
    }

    public void setNum2(int num2) {
        this.num2 = num2;
    }
    public int add(){
        return num1 + num2;
    }

}

class MyValue{
    public int val;

}

public class TestDemo {
    public static void main(String[] args) {

    }



    public static void main1(String[] args) {
        Calculator calculator = new Calculator();
        calculator.setNum1(1);
        calculator.setNum2(2);
        System.out.println(calculator.add());

        calculator.add();
    }
}
